linerel

Syntax

#include <graphics.h>

void linerel(int dx, int dy);

Description

linerel draws a line from the CP (current position) to a point that is a relative distance (dx,dy) from the CP. The CP is advanced by (dx,dy).

Return Value

None.

See also

getlinesettings

line

lineto

setcolor

setlinestyle

setwritemode

Example

/* linerel example */ 



#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>



int main(void)

{

   /* request autodetection */

   int gdriver = DETECT, gmode, errorcode;

   char msg[80];



   /* initialize graphics and local variables */

   initgraph(&gdriver, &gmode, "");



   /* read result of initialization */

   errorcode = graphresult();

   if (errorcode != grOk) {

      printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");



      getch();

      exit(1);

   }



   /* move the CP to location (20,30) */

   moveto(20,30);



   /* create and output a message at (20,30) */

   sprintf(msg, " (%d, %d)", getx(), gety());

   outtextxy(20,30, msg);



   /* draw line to a point a relative distance away from current CP */

   linerel(100, 100);



   /* create and output a message at CP */

   sprintf(msg, " (%d, %d)", getx(), gety());

   outtext(msg);



   /* clean up */

   getch();

   closegraph();



   return 0;

}